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A retrospective analysis of ketamine intravenous therapy for depression in real-world care settings.
A retrospective analysis of ketamine intravenous therapy for depression in real-world care settings. Journal of affective disorders McInnes, L. A., Qian, J. J., Gargeya, R. S., DeBattista, C., Heifets, B. D. 1800Abstract
BACKGROUND: Outcomes of ketamine intravenous therapy (KIT) for depression in real-world care settings have been minimally evaluated. We set out to quantify treatment response to KIT in a large sample of patients from community-based practices.METHODS: We retrospectively analyzed 9016 depression patients who received KIT between 2016 and 2020 at one of 178 community practices across the United States. Depression symptoms were evaluated using the Patient Health Questionnaire-9 (PHQ-9). The induction phase of KIT was defined to be a series of 4-8 infusions administered over 7 to 28 days.RESULTS: Among the 537 patients who underwent induction and had sufficient data, 53.6% of patients showed a response (=50% reduction in PHQ-9 score) at 14-31 days post-induction and 28.9% remitted (PHQ-9 score drop to <5). The effect size was d=1.5. Among patients with baseline suicidal ideation (SI), 73.0% exhibited a reduction in SI. A subset (8.4%) of patients experienced an increase in depressive symptoms after induction while 6.0% of patients reported increased SI. The response rate was uniform across 4 levels of baseline depression severity. However, more severe illness was weakly correlated with a greater drop in scores while remission status was weakly inversely correlated with depression severity. Kaplan-Meier analyses showed that a patient who responds to KIT induction has approximately 80% probability of sustaining response at 4 weeks and approximately 60% probability at 8 weeks, even without maintenance infusions.CONCLUSION: KIT can elicit a robust antidepressant response in community clinics; however, a small percentage of patients worsened.
View details for DOI 10.1016/j.jad.2021.12.097
View details for PubMedID 35027209